<script setup>
import { RouterLink, RouterView } from 'vue-router'
import HelloWorld from './components/HelloWorld.vue'
import axios from "axios";
import {onMounted} from "vue";
import * as PdfLib from 'pdf-lib'

/**
 * 获取pdf文件二进制数组
 * @param url
 * @returns {Promise<void>}
 */
const fetchPdfFile = async (url) => {
  const res = await axios({
    url,
    method: 'get',
    responseType: 'arraybuffer'
  })
  return res.data
}

onMounted(async () => {
  const pdfBuffer1 = await fetchPdfFile('http://94.74.125.174:9000/ops/1702218118098_fast_mail.pdf')
  const pdfBuffer2 = await fetchPdfFile('http://94.74.125.174:9000/ops/1702218565021_fast_mail.pdf')

  const pdf1 = await PdfLib.PDFDocument.load(pdfBuffer1)
  const pdf2 = await PdfLib.PDFDocument.load(pdfBuffer2)

  const mergedPdfDoc = await PdfLib.PDFDocument.create();

  const [existingPage] = await mergedPdfDoc.copyPages(pdf1, [0])
  const [existing2Page] = await mergedPdfDoc.copyPages(pdf2, [0])

  mergedPdfDoc.addPage(existingPage)
  mergedPdfDoc.addPage(existing2Page)

  const mergedPdfBytes = await mergedPdfDoc.save();

  const a = document.createElement('a')
  a.download = '合并后的.pdf'
  a.href = window.URL.createObjectURL(new Blob([mergedPdfBytes]));
  document.body.appendChild(a)
  a.click()
  document.body.removeChild(a)

})

</script>

<template>
  <header>
    <img alt="Vue logo" class="logo" src="@/assets/logo.svg" width="125" height="125" />

    <div class="wrapper">
      <HelloWorld msg="You did it!" />

      <nav>
        <RouterLink to="/">Home</RouterLink>
        <RouterLink to="/about">About</RouterLink>
      </nav>
    </div>
  </header>

  <RouterView />
</template>

<style scoped>
header {
  line-height: 1.5;
  max-height: 100vh;
}

.logo {
  display: block;
  margin: 0 auto 2rem;
}

nav {
  width: 100%;
  font-size: 12px;
  text-align: center;
  margin-top: 2rem;
}

nav a.router-link-exact-active {
  color: var(--color-text);
}

nav a.router-link-exact-active:hover {
  background-color: transparent;
}

nav a {
  display: inline-block;
  padding: 0 1rem;
  border-left: 1px solid var(--color-border);
}

nav a:first-of-type {
  border: 0;
}

@media (min-width: 1024px) {
  header {
    display: flex;
    place-items: center;
    padding-right: calc(var(--section-gap) / 2);
  }

  .logo {
    margin: 0 2rem 0 0;
  }

  header .wrapper {
    display: flex;
    place-items: flex-start;
    flex-wrap: wrap;
  }

  nav {
    text-align: left;
    margin-left: -1rem;
    font-size: 1rem;

    padding: 1rem 0;
    margin-top: 1rem;
  }
}
</style>
